Antifaschistische Aktion was a militant anti-fascist group in Germany from 1932 to 1933. Despite its short lifespan, its logo and iconography are frequently used by the modern anti-fascist movement to this day.

Its logo features a black anarchist flag in front of a red socialist flag, surrounded by a black circle with white text reading the name of the group. Occasionally, the text reads the English translation "Anti-Fascist Action" instead.

https://en.wikipedia.org/wiki/Antifaschistische_Aktion